CN115153602A - Dual-energy ray source device and tomography camera - Google Patents

Abstract

The invention relates to the technical field of medical imaging, in particular to a dual-energy ray source device and a tomography camera. The dual-energy ray source device comprises a first ray tube core, a second ray tube core, a first high-voltage connecting end, a second high-voltage connecting end and a third high-voltage connecting end, wherein the first ray tube core comprises a first cathode assembly and a first anode assembly which are arranged along the advancing direction of a first electron beam, the second ray tube core comprises a second cathode assembly and a second anode assembly which are arranged along the advancing direction of a second electron beam, the connecting line of the focal point of the first ray tube core and the focal point of the second ray tube core, the axial line of the first anode assembly and the axial line of the second anode assembly are parallel to each other, and the first anode assembly and the second anode assembly are opposite and closely arranged; the first cathode assembly and the second cathode assembly are respectively connected with the first high-voltage connecting end and the second high-voltage connecting end; the first anode assembly and the second anode assembly are connected with the third high-voltage connecting end, so that the potentials of the first anode assembly and the second anode assembly are equal.

Description

Dual-energy ray source device and tomography camera

Technical Field

The invention relates to the technical field of medical imaging, in particular to a dual-energy ray source device and a tomography camera.

Background

The conventional CT machine (computed tomography) only uses one X-ray source with energy spectrum distribution to image an object, and the reconstructed result is only an attenuation coefficient image, which can only present the basic detection and positioning information of the detected object, thus sometimes resulting in two different materials being completely the same in CT imaging. The dual-energy ray source CT uses two X-ray sources with different energy spectrum distributions to form an object on the basis of single-spectrum imaging, obtains original data scanned under the two different energy spectrum distributions, and reconstructs information such as electron density, atomic number, attenuation coefficient and the like of the scanned object through a corresponding algorithm, thereby eliminating image information blur in the single-spectrum imaging and achieving the purpose of improving the density contrast resolution of the image.

In the conventional technology, dual-energy ray source CT is generally implemented based on two methods, one is a method based on a detector end, and the other is a method based on a bulb end. The scheme of realizing dual energy at the bulb tube end is divided into two schemes, one scheme is the dual-energy imaging realized by adopting a single-energy X-ray source to rapidly switch high energy and low energy; the other method is to adopt two sets of respectively independent single-energy ray sources to realize dual-energy spectrum ray imaging. However, in the dual-energy imaging scheme implemented by rapidly switching the high energy and the low energy by using the single-energy X-ray source, in the process of rapidly switching the high energy and the low energy, only the tube voltage of the ray can be changed, and the tube current cannot be synchronously switched, which may cause the inconsistency of the signal-to-noise ratio of the high energy and low energy imaging, and introduce errors for the subsequent material identification and analysis. In the scheme of realizing dual-energy imaging by adopting two sets of independent single-energy ray sources, the two sets of independent single-energy ray sources are needed, so that the material cost is very high, and a large amount of correction and matching work is needed between the two sets of systems.

Disclosure of Invention

Based on the structure, the invention provides the double-energy ray source device and the tomography, and the tube core arrangement form and the power supply mode of the double-energy ray source device are improved, so that the space occupation of the double-energy ray source device is greatly reduced, and the double-energy ray source device can be applied to the CT machine with a compact structure.

The invention discloses a dual-energy ray source device which comprises a first ray tube core, a second ray tube core, a first high-voltage connecting end, a second high-voltage connecting end and a third high-voltage connecting end, wherein the first ray tube core comprises a first cathode component and a first anode component, the second ray tube core comprises a second cathode component and a second anode component, a connecting line of a focus of the first ray tube core and a focus of the second ray tube core, an axis of the first anode component and an axis of the second anode component are parallel to each other, and the first anode component and the second anode component are opposite and closely arranged; the first cathode assembly and the second cathode assembly are respectively connected with the first high-voltage connecting end and the second high-voltage connecting end; the first anode assembly and the second anode assembly are connected with the third high-voltage connecting end, so that the potentials of the first anode assembly and the second anode assembly are equal.

In some embodiments, the dual-energy-ray source apparatus further includes a conductive structure, the conductive structure is disposed on a side surface of a straight line connecting the first anode assembly and the second anode assembly, the first anode assembly and the second anode assembly are electrically connected to the conductive structure, and the conductive structure is electrically connected to the third high-voltage connection end.

In some embodiments, the first radiation tube core includes a first tube shell for accommodating the first anode assembly and the first cathode assembly, the second radiation tube core includes a second tube shell for accommodating the second anode assembly and the second cathode assembly, and the conductive structure is a conductive assembly which is partially disposed outside the first tube shell and the second tube shell and partially passes through the first tube shell and the second tube shell to be connected with the first anode assembly and the second anode assembly.

In some embodiments, the first tube core includes a first tube shell for accommodating the first anode assembly and the first cathode assembly, the second tube core includes a second tube shell for accommodating the second anode assembly and the second cathode assembly, the first tube shell is provided with a first conductive tube corresponding to the first anode assembly, the second tube shell is provided with a second conductive tube corresponding to the second anode assembly, and the first conductive tube is connected to the second conductive tube to serve as the conductive structure.

In some embodiments, the first conductive pipe body is communicated with the accommodating space of the second conductive pipe body, and the first anode assembly and the second anode assembly are arranged at intervals.

In some embodiments, the first conductive pipe body is communicated with the accommodating space of the second conductive pipe body, and the first anode assembly and the second anode assembly are integrally disposed.

In some embodiments of the dual-energy-ray source device, the first ray tube core and the second ray tube core are disposed in the tube core box, the first high-voltage connection end, the second high-voltage connection end, and the third high-voltage connection end are disposed on the tube core box, and an optical window is disposed on the tube core box corresponding to the emergent rays of the first ray tube core and the second ray tube core.

In some embodiments of the dual-energy-ray source apparatus, the dual-energy-ray source apparatus further includes a circulation component, the tube core box is provided with a heat dissipation liquid in which the first and second tube cores are immersed, the tube core box is provided with a liquid inlet and a liquid outlet, and the circulation component is configured to enable the heat dissipation liquid to circularly enter and exit from the liquid inlet and the liquid outlet.

The invention discloses a tomography camera which comprises a stator bracket, a rotor bracket, a detector and any one of the double-energy ray source devices, wherein the first high-voltage connecting end of the double-energy ray source device is connected with a first high-voltage generator, the second high-voltage connecting end of the double-energy ray source device is connected with a second high-voltage generator, the third high-voltage connecting end of the double-energy ray source device is connected with a third high-voltage generator, and the high voltages generated by the first high-voltage generator and the second high-voltage generator are different; the detector and the dual-energy ray source device are arranged on the rotor support, the rotor support is arranged on the stator support and is provided with a rotation axis, and a connecting line of dual focuses of the dual-energy ray source device is parallel to the rotation axis.

In some embodiments, the detector is a single-energy detector or a dual-energy detector.

Advantageous effects

Compared with the prior art, the dual-energy ray source device has the advantages that the first anode assembly and the second anode assembly are oppositely and closely arranged, and the first anode assembly of the first ray tube core and the second anode assembly of the second ray tube core share the third high-voltage connecting end, so that the first ray tube core and the second ray tube core are not two independent single-energy ray sources any more, and the work of correcting and matching the two systems is omitted. And because the power supply parts of the first ray tube core and the second ray tube core are shared, on the premise of saving space occupation, the high-voltage electronic breakdown of the first ray tube core and the second ray tube core caused by the pressure difference can be prevented, the cost is reduced, and the function realization is ensured. The connecting line of the focus of the first ray tube core and the focus of the second ray tube core, the axis of the first anode assembly and the axis of the second anode assembly are arranged to be parallel to each other, and the first anode assembly and the second anode assembly are arranged oppositely and closely, so that when the dual-energy ray source device is applied to a CT machine, the dual-focus is ensured to be arranged along the rotation axis of the CT machine, and the space occupation in the direction of the rotation axis is reduced.

Drawings

FIG. 1 is a schematic illustration of a dual energy source apparatus of the present invention in some embodiments;

FIG. 2 is a schematic diagram of a first ray tube core and a second ray tube core of the dual-energy-source device according to the present invention in some embodiments;

fig. 3 is a schematic diagram of a first radiation tube core and a second radiation tube core of the dual-energy-source device according to another embodiment of the present invention;

FIG. 4 is a schematic diagram of a first ray tube core and a second ray tube core of the dual-energy-source device according to the present invention in still another embodiment;

FIG. 5 is a schematic view of the tomography camera of the present invention in some embodiments;

FIG. 6 is a schematic view of the dual energy source apparatus of FIG. 5 in operation with a tomography camera;

wherein, 1 is a first ray tube core, 2 is a second ray tube core, 5 is a dual-energy ray source device, 6 is a rotor support, 7 is a stator support, 8 is a detector, 9 is a light path, 10 is a first shell, 11 is a first electron beam, 12 is a first cathode component, 13 is a first anode component, 14 is a combined anode component, 20 is a second shell, 21 is a second electron beam, 22 is a second cathode assembly, 23 is a second anode assembly, 31 is a first high voltage connection terminal, 32 is a second high voltage connection terminal, 33 is a third high voltage connection terminal, 34 is a conductive assembly, 40 is a die box, 41 is a liquid inlet, 42 is a liquid outlet, 43 is an optical window, 101 is a first conductive tube, and 201 is a second conductive tube.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, fig. 1 shows a perspective view of a dual-energy source device according to an embodiment of the present invention, and the dual-energy source device according to an embodiment of the present invention includes a first radiation tube core 1, a second radiation tube core 2, a first high voltage connection terminal 31, a second high voltage connection terminal 32, and a third high voltage connection terminal 33. Fig. 2 is a schematic diagram of the first radiation tube core 1 and the second radiation tube core 2 in fig. 1. The first radiation die 1 comprises a first cathode assembly 12 and a first anode assembly 13 arranged along the travelling direction of the first electron beam 11, the second radiation die 2 comprises a second cathode assembly 22 and a second anode assembly 23 arranged along the travelling direction of the second electron beam 21, the line connecting the focal point of the first radiation die 1 and the focal point of the second radiation die 2, the axis of the first anode assembly 13 and the axis of the second anode assembly 23 are arranged parallel to each other, and the first anode assembly 13 and the second anode assembly 23 are arranged opposite and in close proximity. The first cathode assembly 12 and the second cathode assembly 22 are respectively connected with a first high-voltage connecting end 31 and a second high-voltage connecting end 32; the first and second anode assemblies 13 and 23 are connected to the third high voltage connection terminal 33, so that the potentials of the first and second anode assemblies 13 and 23 are equal.

Those skilled in the art will appreciate that in the field of tube cores, the cathode assembly will emit electrons that impact the anode assembly to produce X-rays. Specifically, after entering the operating state, the filament serving as the cathode assembly starts to be heated under pressurization of the capacitance generator, and after the temperature of the filament rises to a certain value, electrons start to be emitted, the number of the emitted electrons depends on the temperature of the filament, so that an electron beam having a specific direction is generated, and the electron beam impacts the anode target surface serving as the anode assembly to generate X-rays.

According to the dual-energy radiation source device, the first cathode assembly 12 is connected with the first high-voltage connecting end 31, the second cathode assembly 22 is connected with the second high-voltage connecting end 32, the first anode assembly 13 and the second anode assembly 23 share the third high-voltage connecting end 33, when the first high-voltage connecting end 31 and the second high-voltage connecting end 32 are respectively connected with different high voltages, the first ray tube core 1 and the second ray tube core 2 can emit rays with different energies, and the meaning represented by 'dual-energy' in the dual-energy radiation source device is realized. On the basis, the first anode assembly 13 and the second anode assembly 23 are arranged oppositely and closely, and the first anode assembly 13 of the first radiation tube core 1 and the second anode assembly 23 of the second radiation tube core 2 share the third high-voltage connection end 33, so that the first radiation tube core 1 and the second radiation tube core 2 are not two independent single-energy radiation sources any more, and the correction matching work of the two systems is omitted. As a specific example, the first high voltage connection terminal 31 is connected to a high voltage of-80 KV, the second high voltage connection terminal 32 is connected to a high voltage of-40 KV, and the third high voltage connection terminal 33 is connected to a high voltage of +80KV, so that the tube voltage of the first ray tube core 1 is 160KV and the tube voltage of the second ray tube core 2 is 120KV.

Moreover, because the power supply parts of the first ray tube core 1 and the second ray tube core 2 are shared, compared with the traditional scheme, the material cost of a power supply system can be saved, and a large amount of occupied space can be saved, so that the dual-energy ray source device can be smoothly applied to a CT machine with a compact structure.

In addition, since the first anode assembly 13 and the second anode assembly 23 share the third high-voltage connection end 33, the first anode assembly 13 and the second anode assembly 23 can be arranged very close to each other even without using a high-voltage cable, and the first anode assembly 13 and the second anode assembly 23 do not have potential difference breakdown, so that the focal distance between the first radiation tube core 1 and the second radiation tube core 2 can be compressed to be very small at a low cost. Further, since the size of the detector in the CT machine is closely related to the focal distance of the dual-energy source, compressing the dual focal distance means that the size of the detector in the CT machine can be reduced, thereby allowing better cost control.

On the other hand, by arranging the connection line of the focal point of the first radiation tube core 1 and the focal point of the second radiation tube core 2, the axis of the first anode assembly 13 and the axis of the second anode assembly 23 to be parallel to each other, when the dual-energy radiation source device of the present invention is installed on a CT machine, the dual focal points are arranged to be parallel to the rotation axis (Z direction) of the CT machine, and the arrangement directions of the first radiation tube core 1 and the second radiation tube core 2 are also parallel to the Z direction, so that the installation of other components is prevented from being affected by the space occupation in other directions while the Z direction size of the dual-energy radiation source device of the present invention is reduced.

In summary, compared with the conventional technology, the dual-energy ray source device of the invention can realize smaller occupied Z-direction space, can ensure no potential difference breakdown between the close-range bifocus, has both cost and use effect, has very high feasibility, and can be popularized and used in a large scale.

It should be explained that due to the machining precision in real production, it is difficult to keep the axis of the first anode assembly 13 and the axis of the second anode assembly 23 absolutely parallel, i.e. the axis of the first anode assembly 13 and the axis of the second anode assembly 23 form a certain angle. But as long as the angle is controlled within a reasonable error range, it can be considered that the line connecting the focal point of the first radiation die 1 and the focal point of the second radiation die 2, the axis of the first anode assembly 13 and the axis of the second anode assembly 23 are arranged parallel to each other.

Further, in order to enable the first anode assembly 13 and the second anode assembly 23 to be stably connected to the third high voltage connection end 33 even when they are arranged in close proximity, the dual energy source device of the present invention further includes a conductive structure, which is disposed at a side of a connection line between the first anode assembly 13 and the second anode assembly 23, and the first anode assembly 13 and the second anode assembly 23 are electrically connected to the conductive structure, and the conductive structure is electrically connected to the third high voltage connection end.

By arranging the conductive structure on the side surface of the straight line connecting the first anode assembly 13 and the second anode assembly 23 and forming the electrical connection between the conductive structure and the third high-voltage connection end 33, the space between the first anode assembly 13 and the second anode assembly 23 is not occupied by the first anode assembly 13 and the second anode assembly 23 in the process of forming the connection between the first anode assembly 13 and the second anode assembly 23 and the obvious loose space on the side surface of the straight line connecting the first anode assembly 13 and the second anode assembly 23 is fully utilized, so that the distance between the first anode assembly 13 and the second anode assembly 23 can be compressed as small as possible. After the first anode assembly 13 and the second anode assembly 23 are connected with the conductive structure, the first anode assembly 13 and the second anode assembly 23 are naturally equipotential, so that the situation of breakdown caused by the occurrence of potential difference between the first anode assembly 13 and the second anode assembly 23 is effectively prevented.

It will be appreciated that the electrically conductive structure of the dual energy source apparatus of the present invention has a number of specific forms which can be implemented. For example, the conductive structure may be present independently of the first radiation die 1 and the second radiation die 2. As shown in fig. 2, in this embodiment the first radiation die 1 comprises a first envelope 10 for accommodating a first anode assembly 13, a first cathode assembly 12, and the second radiation die 2 comprises a second envelope 20 for accommodating a second anode assembly 22, a second cathode assembly 23. In this embodiment, the conductive structure is a conductive component 34 independent from the first and second radiation dies 1 and 2, wherein a part of the conductive component 34 is disposed outside the first and second packages 10 and 20, and a part of the conductive component 34 passes through the first and second packages 10 and 20 to be connected with the first and second anode components 13 and 23, respectively. More specifically, the conductive member 34 may be a conductive copper sheet. By arranging the conductive structure as the independent conductive component 34, the dual-energy-ray source device of the invention only needs to install the conductive component 34 at the positions corresponding to the first anode component 13 and the second anode component 23 after the first ray tube core 1 and the second ray tube core 2 are arranged in place during assembly, and only needs to replace the conductive component 34 independently during later maintenance, thereby being more efficient.

In yet other embodiments, as shown in fig. 3, the first radiation die 1 comprises a first envelope 10 for housing a first anode assembly 13, a first cathode assembly 12, and the second radiation die 2 comprises a second envelope 20 for housing a second anode assembly 23, a second cathode assembly 22. In this embodiment, the first package 10 is provided with a first conductive tube 101 corresponding to the first anode assembly 13, the second package 20 is provided with a second conductive tube 201 corresponding to the second anode assembly 23, and the first conductive tube 101 and the second conductive tube 201 are connected to form the conductive structure.

In this embodiment, by utilizing the feature that the first and second package cases 10 and 20 surround and surround the first and second anode assemblies 13 and 23, the first package case 10 is metalized on the portion corresponding to the first anode assembly 13 to form the first conductive tube 101, the second package case 20 is metalized on the portion corresponding to the second anode assembly 23 to form the second conductive tube 201, and the first conductive tube 101 is connected to the second conductive tube 201, so as to obtain the conductive structure. In this embodiment, the dual-energy source device of the present invention does not need to prepare a conductive structure separately during assembly, and after the first conductive pipe 101 is connected to the second conductive pipe 201, the potentials of the first conductive pipe 101 and the second conductive pipe 201 are naturally equal to each other, so that the first anode assembly 13, the second anode assembly 23 and the third high voltage connection terminal 33 can be used as the conductive structure.

As an example of a part of the implementation, the first conductive pipe 101 of the first package 10 and the second conductive pipe 201 of the second package 20 are configured as copper housings, and the rest of the first package 10 and the second package 20 may still be glass housings. Of course, for the specific forms of the first conductive pipe 101 and the second conductive pipe 201, those skilled in the art can make adaptive modifications on the basis of comprehending the technical concepts of the present application, for example, the first conductive pipe 101 and the second conductive pipe 201 can be selected from other conductive materials, and the rest of the first package 10 and the second package 20 can also be selected from other inorganic non-metallic materials, such as ceramics, and the details of the present application are not repeated herein.

As shown in fig. 3, in the illustrated embodiment, the accommodating spaces of the first and second conductive pipes 101 and 201 communicate with each other, but the first and second anode assemblies 13 and 23 are still spaced apart. With such an arrangement, since the first anode assembly 13 and the second anode assembly 23 are already pre-installed in the dual-energy source device, the dual-energy source device of the present invention is an integral device when being installed in the CT machine, so that the installation steps can be reduced, and the installation efficiency can be improved. And when later maintenance, can change first anode assembly 13, second anode assembly 23, first cathode assembly 12, second cathode assembly 22 alone again, reduced the expense of later maintenance. In some embodiments, the distance between the two focuses of the dual-energy ray device can be controlled within 10mm-25mm. In summary, the solutions of the embodiments take into account the installation cost, the maintenance cost, and the focal point distance, and are balanced as a whole.

As shown in fig. 4, in the illustrated embodiment, the accommodating spaces of the first conductive pipe 101 and the second conductive pipe 201 are communicated with each other, but the first anode assembly 13 and the second anode assembly 23 are integrally formed as the integrated anode assembly 14, in other words, anode target surfaces corresponding to the first cathode assembly 12 and the second cathode assembly 22 are disposed on two sides of the integrated anode assembly 14. By integrally arranging the first anode assembly 13 and the second anode assembly 23, the distance between two focuses obtained by matching the first cathode assembly 12, the second cathode assembly 22 and the integrated anode assembly 14 can be compressed to be within 10mm, so that the whole structure of the dual-energy ray source device is more compact.

In a part of the embodiment shown in fig. 1, the dual-energy-source device of the present invention further includes a die box 40, the first radiation die 1 and the second radiation die 2 are disposed in the die box 40, the first high-voltage connection end 31, the second high-voltage connection end 32, and the third high-voltage connection end 33 are disposed on the die box 40, and an optical window 43 is disposed on the die box 40 corresponding to the exit lines of the first radiation die 1 and the second radiation die 2. Specifically, the shell of the tube core box body 40 is attached with a lead shielding material, so that X rays generated by the tube core of the ray tube can be effectively absorbed, and the radiation hazard of the rays to the outside is prevented. The light window 43 is made of low-density material or thin aluminum plate, which can ensure high transmittance of rays and close the box body.

It will be appreciated that two optical windows 43 may be provided, each optical window 43 being provided for an exit line of the first radiation die 1, respectively the second radiation die 2. In particular, when the focal point distances of the first radiation tube core 1 and the second radiation tube core 2 are close, for example, the focal point distance in the foregoing embodiment is less than 10mm, the optical window 43 may also be provided as one, that is, the first radiation tube core 1 and the second radiation tube core 2 share one optical window 43.

In some embodiments, the dual-energy radiation source apparatus of the present invention further includes a circulation component, a heat dissipation liquid for immersing the first radiation tube core 1 and the second radiation tube core 2 is disposed in the tube core box 40, a liquid inlet 41 and a liquid outlet 42 are disposed on the tube core box 40, and the circulation component is configured to circulate the heat dissipation liquid in and out of the liquid inlet 41 and the liquid outlet 42.

Specifically, the heat dissipation liquid is insulating oil, and on one hand, the insulating oil constructs an insulating environment inside the dual-energy radiation source device, and on the other hand, the insulating oil takes away heat generated inside the dual-energy radiation source device in time. A plurality of ray tube cores share one set of heat dissipation circulating system, so that the size of the double-energy-ray source device can be reduced, and further the cost is saved.

On the other hand, the invention discloses a tomography camera, as shown in fig. 5, which comprises a stator support 7, a rotor support 6, a detector 8, a first high voltage generator, a second high voltage generator, a third high voltage generator and any one of the above dual-energy ray source device 5 of the invention, wherein a first high voltage connecting end 31 of the dual-energy ray source device 5 is connected with the first high voltage generator, a second high voltage connecting end 32 is connected with the second high voltage generator, a third high voltage connecting end 33 is connected with the third high voltage generator, and the high voltages generated by the first high voltage generator and the second high voltage generator are different; the detector 8 and the dual-energy ray source 5 are arranged on a rotor bracket 6, the rotor bracket 6 is arranged on a stator bracket 7 and can emit and rotate around a Z direction in the figure as a rotation axis, wherein the connecting line of the dual focuses in the dual-energy ray source device is parallel to the Z axis.

In operation of the inventive tomography apparatus, the dual energy source device 5, the detector 8 and the rotor support 6 are rotated together with an angular velocity forming an XOY plane as shown in fig. 6. The detected object passes through the central area of the inner ring of the rotor bracket 6 along the normal line of the XOY plane, namely the Z direction, at a certain speed, meanwhile, the first ray tube core 1 and the second ray tube core 2 of the dual-energy ray source device sequentially emit rays, the X rays penetrate through the light window 43, penetrate through the object to be detected and are received by the detector 6, the received X rays partially form a light path 9, CT data corresponding to an energy spectrum are further obtained, and the obtained data are reconstructed through an algorithm and identified through a substance, so that the material composition of the detected object is more accurately identified and a special substance is distinguished.

The tomography machine of the invention can reduce the distance between the focus of the first ray tube core 1 and the focus of the second ray tube core 2 by using the dual-energy ray source of the invention and arranging the dual-focus connecting line of the dual-energy ray source device to be parallel to the rotation axis (Z direction), thereby reducing the size of the detector in the Z direction, compressing the size of the tomography machine in the Z direction and saving the cost.

Furthermore, the detector in the tomography camera can be a single-energy detector or a dual-energy detector, and the dual-energy ray source device can be matched with the single-energy detector to obtain CT images under two energy spectrums; the dual-energy detector is matched with the dual-energy detector for use, and CT images under four energy spectrums can be acquired.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A dual-energy ray source device is characterized in that the dual-energy ray source device comprises a first ray tube core, a second ray tube core, a first high-voltage connecting end, a second high-voltage connecting end and a third high-voltage connecting end, wherein,

the first radiation tube core comprises a first cathode assembly and a first anode assembly, the second radiation tube core comprises a second cathode assembly and a second anode assembly, the line connecting the focal point of the first radiation tube core and the focal point of the second radiation tube core, the axis of the first anode assembly and the axis of the second anode assembly are parallel to each other, and the first anode assembly and the second anode assembly are oppositely and closely arranged;

the first cathode assembly and the second cathode assembly are respectively connected with the first high-voltage connecting end and the second high-voltage connecting end; the first anode assembly and the second anode assembly are connected with the third high-voltage connection end, so that the potentials of the first anode assembly and the second anode assembly are equal.

2. The dual energy ray source device of claim 1, further comprising a conductive structure disposed on a side of a straight line connecting the first anode assembly and the second anode assembly, wherein the first anode assembly and the second anode assembly are electrically connected to the conductive structure, and the conductive structure is electrically connected to the third high voltage connection terminal.

3. The dual-energy ray source device of claim 2, wherein the first radiation tube core comprises a first tube shell for accommodating the first anode assembly and the first cathode assembly, the second radiation tube core comprises a second tube shell for accommodating the second anode assembly and the second cathode assembly, and the conductive structure is a conductive assembly partially disposed outside the first tube shell and the second tube shell and partially penetrating through the first tube shell and the second tube shell to connect with the first anode assembly and the second anode assembly.

4. The dual energy ray source device of claim 2, wherein said first ray tube core comprises a first tube housing for accommodating said first anode assembly and said first cathode assembly, said second ray tube core comprises a second tube housing for accommodating said second anode assembly and said second cathode assembly, said first tube housing is provided with a first conductive tube corresponding to said first anode assembly, said second tube housing is provided with a second conductive tube corresponding to said second anode assembly, and said first conductive tube and said second conductive tube are connected as said conductive structure.

5. The dual energy ray source apparatus of claim 4, wherein the first conductive tube body is in communication with the receiving space of the second conductive tube body, and the first anode assembly is spaced apart from the second anode assembly.

6. The dual energy ray source device of claim 4, wherein the first conductive tube body is in communication with the receiving space of the second conductive tube body, and the first anode assembly is integrally disposed with the second anode assembly.

7. The dual-energy-ray source device of claim 1, further comprising a tube core box, wherein the first and second ray tube cores are disposed in the tube core box, the first, second, and third high-voltage connection ends are disposed on the tube core box, and an optical window is disposed on the tube core box corresponding to the emergent rays of the first and second ray tube cores.

8. The dual-energy ray source device of claim 7, further comprising a circulation component, wherein the tube core box is provided with a heat dissipation liquid for immersing the first and second ray tube cores, the tube core box is provided with a liquid inlet and a liquid outlet, and the circulation component is configured to circulate the heat dissipation liquid in and out of the liquid inlet and the liquid outlet.

9. A tomography apparatus, comprising a stator frame, a rotor frame, a detector, a first high voltage generator, a second high voltage generator, a third high voltage generator and the dual energy ray source apparatus of any one of claims 1 to 8, wherein the first high voltage connection terminal is connected to the first high voltage generator, the second high voltage connection terminal is connected to the second high voltage generator, the third high voltage connection terminal is connected to the third high voltage generator, and the high voltages generated by the first high voltage generator and the second high voltage generator are different; the detector and the dual-energy ray source device are arranged on the rotor support, the rotor support is arranged on the stator support and is provided with a rotation axis, and a connecting line of dual focuses of the dual-energy ray source device is parallel to the rotation axis.

10. The tomography camera of claim 9, wherein said detector is a single energy detector or a dual energy detector.

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